Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 25, 2016
Cash Flows From Operating Activities:
Net income	$ 399.2	$ 118.3
Adjustments to reconcile net cash from operating activities:
Depreciation and amortization	204.0	211.5
Share-based compensation	16.4	11.3
Deferred income taxes	(73.6)	(115.1)
Non-cash impairment charges	0.0	16.9
Gain on divestitures	(427.2)	(0.4)
Other non-cash items	17.8	5.1
Changes in assets and liabilities, net of the effects of acquisitions:
Accounts receivable, net	(57.4)	(17.8)
Inventories	(13.5)	15.8
Accounts payable	(6.6)	(3.2)
Income taxes	(60.6)	(10.4)
Other	(95.9)	(3.4)
Net cash from operating activities	(97.4)	228.6
Cash Flows From Investing Activities:
Capital expenditures	(52.6)	(42.4)
Acquisitions and intangibles, net of cash acquired	0.0	(170.1)
Proceeds from divestitures, net of cash	576.9	5.8
Other	(10.8)	3.9
Net cash from investing activities	513.5	(202.8)
Cash Flows From Financing Activities:
Issuance of external debt	25.0	16.4
Repayment of external debt and capital leases	(233.9)	(21.9)
Debt financing costs	(13.0)	0.0
Proceeds from exercise of share options	2.2	2.7
Repurchase of shares	(279.6)	(226.2)
Other	1.0	0.0
Net cash from financing activities	(498.3)	(229.0)
Effect of currency rate changes on cash	0.0	1.4
Cash, Cash Equivalents and Restricted Cash, Period Increase (Decrease)	(82.2)	(201.8)
Cash and cash equivalents	259.8	341.4
Restricted Cash and Investments, Current	0.0	26.2
Restricted Cash and Investments, Noncurrent	19.1	19.0
Cash and Cash Equivalents, Including Restricted Cash	$ 361.1	$ 588.4