Schedule II - Valuation And Qualifying Accounts And Reserves (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year		$ 217.0	$ 211.6	$ 198.3
Additions Charged to Costs and Expense		287.3	265.4	276.5
Other (Deductions) Additions	[1]	(268.7)	(260.0)	(263.2)
Balance at end of year		235.6	217.0	211.6
Valuation allowance-deferred tax assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year		15.1	17.1	16.5
Additions Charged to Costs and Expense		16.2	0.0	0.6
Other (Deductions) Additions	[1]	0.0	(2.0)
Balance at end of year		$ 31.3	$ 15.1	$ 17.1

[1] Other (Deductions) Additions consists primarily of write-offs of accounts receivable amounts.