Compensation - Additional Information (Detail) (USD $)	12 Months Ended						3 Months Ended	12 Months Ended			12 Months Ended			3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Class A Common Stock [Member]	Dec. 31, 2012 Class A Common Stock [Member]	Jul. 27, 2011 Class A Common Stock [Member]	Jun. 30, 2013 Global Partnership Restructuring Program [Member]	Dec. 31, 2013 Global Partnership Restructuring Program [Member]	Jun. 30, 2013 Global Partnership Restructuring Program [Member] Class A Common Stock [Member]	Jun. 30, 2013 Global Partnership Restructuring Program [Member] Restricted Stock [Member]	Dec. 31, 2013 Limited Partnership Units [Member]	Dec. 31, 2012 Limited Partnership Units [Member]	Dec. 31, 2011 Limited Partnership Units [Member]	Jun. 30, 2013 Minimum [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Minimum [Member] Limited Partnership Units [Member]	Jun. 30, 2013 Maximum [Member]	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Maximum [Member] Limited Partnership Units [Member]	Dec. 31, 2013 Equity Options [Member]	Dec. 31, 2012 Equity Options [Member]	Dec. 31, 2011 Equity Options [Member]	Dec. 31, 2013 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2012 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2011 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 Restricted Stock Units (RSUs) [Member] Minimum [Member]	Dec. 31, 2013 Restricted Stock Units (RSUs) [Member] Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized to be delivered pursuant to awards granted	200,000,000
Aggregate number of shares grant of future awards	61,700,000
Number of limited partnership units granted exchangeability											9,800,000	24,300,000	14,200,000
Equity-based compensation expense								$ 304,100,000			$ 57,000,000	$ 127,100,000	$ 108,300,000										$ 5,800,000	$ 7,800,000	$ 9,000,000
Redemption of partner units							76,000,000	76,000,000
Number of limited partnership units exchangeable into shares											1,900,000	6,400,000	1,800,000
Notional value with post-termination pay-out amount	35,100,000	64,500,000	37,600,000
Aggregate estimated fair value of limited partnership units held by employees											5,500,000	12,300,000
Number of unvested limited partnership units	4,100,000	6,600,000	2,600,000
Restricted shares, restriction period														5 years		3 years	10 years		5 years							2 years	4 years
Compensation expense related to limited partnership units that were not redeemed											4,600,000	6,300,000	7,800,000
Income allocated to limited partnership units	62,600,000	13,000,000	18,400,000
Restricted stock unit, Conversion description	Each RSU is settled in one share of Class A common stock upon completion of the vesting period.
Awards granted											49,577,157	41,691,703	21,244,357										1,543,183	1,729,894	1,368,671
Aggregate estimated grant date fair values																							4,900,000	9,100,000	11,000,000
Value of shares withheld																							1,200,000	2,300,000	3,600,000
Aggregate estimated grant date fair value of outstanding RSUs																							12,700,000	15,500,000
Unrecognized compensation expense related to unvested RSUs																							9,700,000
Shares granted				202,671,000	141,955,000	995,911			44,000,000	41,000,000
Restricted shares saleable period															5 years			10 years
Number of shares released the restrictions	5,900,000
Options granted during the period																				0	0	0
Exercised options			2,047,249																	0	0
Aggregate intrinsic value of options exercised																						7,300,000
Cash received from option exercises																				0	0	7,700,000
Compensation expense related to stock options	0	0	0
Unrecognized compensation expense related to unvested stock options																				$ 0