XML 64 R40.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Investments Investments (Details) - naviHealth [Member] - USD ($)
$ in Millions
1 Months Ended 6 Months Ended
Aug. 31, 2018
Dec. 31, 2018
Dec. 31, 2019
Jun. 30, 2019
Aug. 01, 2018
Investment [Line Items]          
Noncontrolling Interest, Ownership Percentage by Parent         98.00%
Partnership Indirect Ownership         100.00%
Pre-Tax Gain on Divestiture   $ 508      
Proceeds from Divestiture of Businesses $ 737        
Equity Method Investment, Ownership Percentage         44.00%
Equity Method Investments     $ 330 $ 334