Valuation Accounts and Reserves (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at January 1		$ 1.6	$ 1.6	$ 1.6
Deductions
Balance at December 31		1.6	1.6	1.6
Deferred tax asset valuation allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at January 1		294.4	306.5	633.7
Charged (Credited) to Expense		25.7	40.8	37.7
Deductions
Other	[1]	(14.7)	(52.9)	(364.9)
Balance at December 31		$ 305.4	$ 294.4	$ 306.5

[1] Amount in 2016 for deferred tax asset valuations is primarily associated with an increase in foreign tax credit carry forwards. Amount in 2015 for deferred tax asset valuation allowance is primarily associated with utilization of foreign tax credit carry forwards. Amount in 2014 for deferred tax asset valuation allowance is primarily associated with final abandonment of certain foreign investments in 2014, essentially offsetting changes in deferred tax assets.