Divestiture of a Business (Details) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2016	Jun. 30, 2015
Noncash or Part Noncash Divestitures [Line Items]
Gain from sale of business, pre-tax	$ (113)	$ 51
Nurse Triage \| Operating Segments \| Technology Solutions
Noncash or Part Noncash Divestitures [Line Items]
Proceeds from divestiture of businesses		84
Gain from sale of business, pre-tax		51
Gain from sale of business, after tax		$ 38

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Name:	us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration