v2.4.0.6

Stock Incentive Plans (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			6 Months Ended					12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Long-Term Incentive Plan [Member]	Jun. 30, 2011 Long-Term Incentive Plan [Member]	Jun. 30, 2012 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2011 Restricted Stock Units (RSUs) [Member]
RSU Shares [Roll Forward]
RSUs Outstanding								27.9	22.5
Granted						7.0	5.0	8.0
Settled								(1.9)
Forfeited or expired								(0.7)
RSUs Unvested and Expected to Vest								18.0
RSUs Vested and Payable								9.3
RSU Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value								$ 22.95	$ 23.01
Grants in Period, Weighted Average Grant Date Fair Value								$ 25.11
Settled, Weighted Average Grant Date Fair Value								$ 31.65
Forfeited or expired, Weighted Average Grant Date Fair Value								$ 25.02
RSUs Grant Date Fair Value, Unvested and Expected to Vest								$ 23.62
RSUs Grant Date Fair Value, Vested and Payable								$ 21.47
Remaining Contractual Term [Abstract]
Weighted Average Remaining Contractual Term								1.2	1.1
RSUs Weighted Average Remaining Contractual Terms, Unvested and Expected to Vest								1.5
RSUs Weighted Average Remaining Contractual Terms Vested and Payable								0.0
Share-based Compensation (Narratives) [Abstract]
RSUs Reclassified From Equity to Liability		$ 97
Share-based Compensation Expense	55		60	127	113
Unrecognized Compensation Expense For Nonvested Equity Awards	307			307
Weighted Average in Years for Total Unrecognized Compensation Expense				1.5
Fair Value of Vested RSUs				$ 82	$ 49

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The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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