XML 100 R82.htm IDEA: XBRL DOCUMENT v3.10.0.1
Benefit Plans - Fair Value of Pension Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value $ 1,057 $ 816 $ 602
Significant Unobservable Inputs (Level 3) | Pooled funds - fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0 35
Significant Unobservable Inputs (Level 3) | Corporate bonds and other fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1,032 790 $ 538
Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 9,908 10,973  
Pension Plans | Total Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 7,915 8,534  
Pension Plans | Total Fair Value | U.S. equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 2 2  
Pension Plans | Total Fair Value | Non-U.S. equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 5 5  
Pension Plans | Total Fair Value | Pooled funds - equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1,951 2,340  
Pension Plans | Total Fair Value | Total equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1,958 2,347  
Pension Plans | Total Fair Value | Government bonds      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 3,156 3,237  
Pension Plans | Total Fair Value | Pooled funds - fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 573 602  
Pension Plans | Total Fair Value | Corporate bonds and other fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 2,050 2,102  
Pension Plans | Total Fair Value | Total fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 5,779 5,941  
Pension Plans | Total Fair Value | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 130 156  
Pension Plans | Total Fair Value | Private equity      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 2 2  
Pension Plans | Total Fair Value | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 44 86  
Pension Plans | Total Fair Value | Other      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 2 2  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1,469 1,658  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 2 2  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 5 5  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pooled funds - equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 743 848  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 750 855  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Government bonds      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 62 34  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pooled funds - fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 429 449  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds and other fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 87 133  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 578 616  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 108 120  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Private equity      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 32 66  
Pension Plans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1 1  
Pension Plans | Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 5,389 6,060  
Pension Plans | Significant Other Observable Inputs (Level 2) | U.S. equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Other Observable Inputs (Level 2) | Non-U.S. equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled funds - equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1,208 1,492  
Pension Plans | Significant Other Observable Inputs (Level 2) | Total equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1,208 1,492  
Pension Plans | Significant Other Observable Inputs (Level 2) | Government bonds      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 3,094 3,203  
Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled funds - fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 144 153  
Pension Plans | Significant Other Observable Inputs (Level 2) | Corporate bonds and other fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 931 1,179  
Pension Plans | Significant Other Observable Inputs (Level 2) | Total fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 4,169 4,535  
Pension Plans | Significant Other Observable Inputs (Level 2) | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 13  
Pension Plans | Significant Other Observable Inputs (Level 2) | Private equity      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Other Observable Inputs (Level 2) | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 12 20  
Pension Plans | Significant Other Observable Inputs (Level 2) | Other      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1,057 816  
Pension Plans | Significant Unobservable Inputs (Level 3) | U.S. equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Unobservable Inputs (Level 3) | Non-U.S. equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled funds - equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Unobservable Inputs (Level 3) | Total equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Unobservable Inputs (Level 3) | Government bonds      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled funds - fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Unobservable Inputs (Level 3) | Corporate bonds and other fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1,032 790  
Pension Plans | Significant Unobservable Inputs (Level 3) | Total fixed-income securities      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1,032 790  
Pension Plans | Significant Unobservable Inputs (Level 3) | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 22 23  
Pension Plans | Significant Unobservable Inputs (Level 3) | Private equity      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 2 2  
Pension Plans | Significant Unobservable Inputs (Level 3) | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 0 0  
Pension Plans | Significant Unobservable Inputs (Level 3) | Other      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value 1 1  
Pension Plans | Total assets in the fair value hierarchy      
Defined Benefit Plan Disclosure [Line Items]      
Total investments at fair value $ 1,993 $ 2,439