Variable Interest Entities (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Variable Interest Entity [Line Items]
Taxes on income	$ 832.0	$ 794.0	$ 634.0
Accrued expenses and other liabilities	2,151.0	1,816.0
LIHTC Investments [Member]
Variable Interest Entity [Line Items]
Amortization	3.3	0.3
Tax credits and other benefits recognized	4.5	0.5
Investment carrying value	104.0	45.0
Accrued expenses and other liabilities	$ 84.0	$ 40.0
LIHTC Investments [Member] | Minimum [Member]
Variable Interest Entity [Line Items]
Commitment, expected payment date	2016
LIHTC Investments [Member] | Maximum [Member]
Variable Interest Entity [Line Items]
Commitment, expected payment date	2020