Debt - Schedule of Carrying Values and Fair Values of Debt Outstanding (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
4.000% Senior Secured Notes due 2027 \| Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	$ 1,000	$ 1,000
4.375% Senior Secured Notes due 2028 \| Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	500	500
7.950% Debentures due 2025 \| Unsecured Debt
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	217	217
8.375% Debentures due 2027 \| Unsecured Debt
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	167	167
Other
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	39	41
Secured Debt \| Credit Agreement \| Line of Credit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	1,680	1,680
Reported Value Measurement
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	3,585	3,586
Reported Value Measurement \| 4.000% Senior Secured Notes due 2027 \| Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	995	995
Reported Value Measurement \| 4.375% Senior Secured Notes due 2028 \| Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	496	496
Reported Value Measurement \| 7.950% Debentures due 2025 \| Unsecured Debt
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	216	216
Reported Value Measurement \| 8.375% Debentures due 2027 \| Unsecured Debt
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	166	166
Reported Value Measurement \| Other
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	39	41
Reported Value Measurement \| Secured Debt \| Credit Agreement \| Line of Credit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt, gross	1,673	1,672
Estimate of Fair Value Measurement
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	3,525	3,534
Estimate of Fair Value Measurement \| 4.000% Senior Secured Notes due 2027 \| Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	935	942
Estimate of Fair Value Measurement \| 4.375% Senior Secured Notes due 2028 \| Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	467	471
Estimate of Fair Value Measurement \| 7.950% Debentures due 2025 \| Unsecured Debt
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	223	221
Estimate of Fair Value Measurement \| 8.375% Debentures due 2027 \| Unsecured Debt
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	174	172
Estimate of Fair Value Measurement \| Other
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	39	41
Estimate of Fair Value Measurement \| Secured Debt \| Credit Agreement \| Line of Credit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	$ 1,687	$ 1,687

Pactiv Evergreen Inc. 10-Q