Summary of Debt Obligations (Detail) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Line Items]
Amounts outstanding	[1]	$ 24,122.1	$ 14,935.7
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Net	[2]	(106.0)	(54.0)
Debt Obligations Before Fair Value Adjustments
Debt Disclosure [Line Items]
Amounts outstanding	[3]	24,226.3	14,985.0
Derivatives in Fair Value Hedging Relationships
Debt Disclosure [Line Items]
Amounts outstanding	[4]	1.8	4.7
Currency US Dollar
Debt Disclosure [Line Items]
Amounts outstanding		$ 17,210.2	$ 9,054.7
Currency US Dollar | Fixed Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	4.00%	4.50%
Amounts outstanding		$ 14,190.6	$ 6,604.7
Currency US Dollar | Floating Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	3.30%	3.20%
Amounts outstanding		$ 3,019.6	$ 2,450.0
Currency Euro
Debt Disclosure [Line Items]
Amounts outstanding		$ 4,617.8	$ 3,335.0
Currency Euro | Fixed Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	2.40%	3.20%
Amounts outstanding		$ 3,951.9	$ 3,014.7
Currency Euro | Floating Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	0.30%	2.90%
Amounts outstanding		$ 665.9	$ 320.3
Currency Japanese Yen
Debt Disclosure [Line Items]
Amounts outstanding		$ 312.0	$ 312.9
Currency Japanese Yen | Fixed Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	2.90%	2.90%
Amounts outstanding		$ 104.0	$ 104.3
Currency Japanese Yen | Floating Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	0.30%	0.30%
Amounts outstanding		$ 208.0	$ 208.6
Currency British Pound Sterling [Member] | Fixed Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	5.30%	5.30%
Amounts outstanding		$ 1,100.1	$ 1,163.3
Currency Chinese Renminbi [Member] | Floating Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	4.30%	5.60%
Amounts outstanding		$ 491.8	$ 630.1
Foreign currency denominated debt
Debt Disclosure [Line Items]
Amounts outstanding	[6]	$ 494.4	$ 489.0
Foreign currency denominated debt | Fixed Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	2.10%	2.10%
Amounts outstanding		$ 264.7	$ 268.3
Foreign currency denominated debt | Floating Rate Debt
Debt Disclosure [Line Items]
Interest rates	[5]	3.10%	4.00%
Amounts outstanding		$ 229.7	$ 220.7

[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.

[2] FASB issued an Update that requires debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability.

[3] Aggregate maturities for 2015 debt balances, before fair value adjustments and deferred debt costs, were as follows (in millions): 2016–$0.0; 2017–$1,065.1; 2018–$1,755.3; 2019–$3,844.2; 2020–$2,463.9; Thereafter–$15,097.8. These amounts include a reclassification of short-term obligations totaling $2.4 billion to long-term obligations as they are supported by a long-term line of credit agreement expiring in December 2019.

[4] The carrying value of underlying items in fair value hedges, in this case debt obligations, are adjusted for fair value changes to the extent they are attributable to the risk designated as being hedged. The related hedging instrument is also recorded at fair value in prepaid expenses and other current assets, miscellaneous other assets or other long-term liabilities.

[5] Weighted-average effective rate, computed on a semi-annual basis.

[6] Primarily consists of Swiss Francs and Korean Won.