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Debt and Financing Activities - Senior Bridge Term Loan Facilities (Details) - 2014 Bridge Loan - USD ($)			1 Months Ended	2 Months Ended	12 Months Ended
	Mar. 10, 2014	Feb. 04, 2014	Jan. 31, 2014	Mar. 11, 2014	Mar. 31, 2014
Debt Instrument [Line Items]
Credit facility borrowing capacity			$ 5,500,000,000.0
Credit facility expiration period			364 days
Amount borrowed under facility		$ 4,957,000,000
Repayments of lines of credit	$ 4,076,000,000
Fees related to bridge loan					$ 46,000,000
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit facility interest rate				1.39%

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- Definition

Represents the charge against earnings during the period for commitment fees and debt issuance expenses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
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Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The effective interest rate during the reporting period.

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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