Summary of Debt Obligations (Table Footnotes) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Line Items]
2016		$ 0.0
2017		1,065.1
2018		1,755.3
2019		3,844.2
2020		2,463.9
Thereafter		15,097.8
Reclassification to Long Term Debt		2,400.0
Amounts outstanding	[1]	24,122.1	$ 14,935.7
Net Issuance Maturities Of Debt [Member]
Debt Disclosure [Line Items]
Increase (Decrease) In debt obligations		$ 9,700.0

[1] The net increase in 2015 was primarily due to net issuances of $9.7 billion in connection with the Company's plan to optimize its capital structure.