Commitments and Contingencies, Additional Lease Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Jan. 02, 2019	Dec. 31, 2018
Lease Accounting Standard [Abstract]
Right-of-use assets	[1]	$ 210.2
Lease liabilities	[2]	212.0
Undiscounted total			$ 314.4
Operating lease income		$ 14.4
ASC 842 [Member]
Lease Accounting Standard [Abstract]
Right-of-use assets				$ 246.1
Lease liabilities				$ 246.1

[1] ROU asset amounts are a component of “Other assets” on our consolidated balance sheet.

[2] At December 31, 2019, lease liabilities of $40.4 million and $171.6 million were included within “Other current liabilities” and “Other liabilities,” respectively.