Supplemental Disclosures - Non-Cash Financing Activities And Cash Payments (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 29, 2018	Jun. 30, 2017
Non-cash activities:
Capital expenditures in accounts payable and other liabilities	$ 199.5	$ 196.4
Cash (received) paid for:
Interest income	(2.0)	(1.1)
Interest expense	41.0	49.0
Income taxes	$ 32.4	$ 35.5

Future cash outflow to pay for purchases of fixed assets that have occurred.

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