Pension and Other Postretirement Benefit Plans 9 (Details) (USD $)	12 Months Ended	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 28, 2014	Jun. 07, 2013	Dec. 29, 2013	Apr. 28, 2013	Apr. 29, 2012
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 2,920,000,000		$ 2,960,000,000	$ 3,110,000,000
Aggregate accumulated benefit obligation	1,144,800,000		338,100,000	631,700,000
Aggregate projected benefit obligation	1,144,800,000		339,100,000	640,800,000
Aggregate fair value of plan assets	1,079,500,000		312,700,000	460,900,000
Aggregate benefit obligation	1,211,800,000		692,800,000	900,300,000
Aggregate fair value of plan assets	1,114,500,000		619,900,000	720,500,000
Estimated future employer contributions in next fiscal year	101,700,000
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Change in other comprehensive loss related to postretirement benefit (gains) losses during the period	64,700,000	79,700,000	80,000,000	(255,700,000)
Change in other comprehensive loss related to reclassification of postretirement benefit (losses) gains to net income	4,200,000	(10,700,000)	(19,500,000)	(82,900,000)
Company contributions to benefit plans	102,300,000	6,800,000	152,100,000
2015	131,703,000
Other Retiree Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Change in other comprehensive loss related to postretirement benefit (gains) losses during the period	500,000	6,000,000	41,200,000	(9,100,000)
Change in other comprehensive loss related to reclassification of postretirement benefit (losses) gains to net income	(12,900,000)	400,000	(1,000,000)	4,400,000
Company contributions to benefit plans	12,400,000	1,400,000	8,000,000
2015	14,250,000
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumed annual composite rate of increase in the cost of health care	4.80%
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumed annual composite rate of increase in the cost of health care	5.90%
Maximum [Member] \| Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities				1.00%	1.00%
Predecessor [Member] \| Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Special/contractual termination benefits		17,230,000		0
Predecessor [Member] \| Other Retiree Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Special/contractual termination benefits		$ 0		$ 0

H. J. Heinz Corp II 10-K