Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 26, 2021	Dec. 27, 2020	Sep. 27, 2020
Revenue from Contract with Customer [Abstract]
Contract assets - current	$ 263.3	$ 284.4	$ 271.8
Contract assets - long term	108.1	77.0	84.9
Total	371.4	361.4	356.7
Contract liabilities - current	147.0	161.0	147.6
Contract liabilities - long term	9.7	18.2	17.9
Total	$ 156.7	$ 179.2	$ 165.5

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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