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v3.20.2

Short-Term Borrowings and Long-Term Debt (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Par Value | $ 42,917 | $ 39,817
Carrying value, Combined Amount | 42,662 | 39,474
Fair Value | 50,597 | 44,234
Commercial Paper [Member] |  |
Debt Instrument [Line Items] |  |
Commercial Paper | 0 | 400
Par Value | 0 | 400
Fair Value | $ 0 | 400
2.700% Notes due July 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.70% |
Par Value | $ 0 | 1,500
Carrying Value, Current | 0 | 1,499
Fair Value | 0 | 1,506
Floating rate notes due October 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Par Value | 300 | 300
Carrying Value, Current | 300 | 300
Fair Value | $ 300 | 300
3.875% notes due October 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.875% |
Par Value | $ 450 | 450
Carrying Value, Current | 450 | 450
Fair Value | $ 451 | 455
1.950% notes due October 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.95% |
Par Value | $ 900 | 900
Carrying Value, Current | 900 | 899
Fair Value | $ 901 | 900
4.700% notes due February 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.70% |
Par Value | $ 400 | 400
Carrying Value, Current | 403 |
Carrying Value, Noncurrent |  | 403
Fair Value | $ 402 | 410
2.125% notes due March 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.125% |
Par Value | $ 750 | 750
Carrying Value, Current | 749 |
Carrying Value, Noncurrent |  | 749
Fair Value | 756 | 753
Floating rate notes due June 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Par Value | 350 | 350
Carrying Value, Noncurrent | 350 | 349
Fair Value | $ 351 | 350
3.150% notes due June 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.15% |
Par Value | $ 400 | 400
Carrying Value, Noncurrent | 400 | 399
Fair Value | $ 408 | 407
3.375% notes due November 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.375% |
Par Value | $ 500 | 500
Carrying Value, Noncurrent | 509 | 501
Fair Value | $ 513 | 512
2.875% notes due December 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.875% |
Par Value | $ 750 | 750
Carrying Value, Noncurrent | 765 | 753
Fair Value | $ 774 | 765
2.875% notes due March 2022 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.875% |
Par Value | $ 1,100 | 1,100
Carrying Value, Noncurrent | 1,115 | 1,087
Fair Value | $ 1,133 | 1,121
3.350% notes due July 2022 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.35% |
Par Value | $ 1,000 | 1,000
Carrying Value, Noncurrent | 998 | 998
Fair Value | $ 1,054 | 1,036
2.375% notes due October 2022 [Member] [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.375% |
Par Value | $ 900 | 900
Carrying Value, Noncurrent | 897 | 896
Fair Value | $ 937 | 911
Zero Coupon notes due November 2022 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 0.00% |
Par Value | $ 15 | 15
Carrying Value, Noncurrent | 13 | 13
Fair Value | $ 14 | 14
2.750% notes due February 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.75% |
Par Value | $ 625 | 625
Carrying Value, Noncurrent | 646 | 624
Fair Value | $ 656 | 638
2.875% notes due March 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.875% |
Par Value | $ 750 | 750
Carrying Value, Noncurrent | 793 | 770
Fair Value | $ 794 | 770
3.500% notes due June 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.50% |
Par Value | $ 750 | 750
Carrying Value, Noncurrent | 748 | 747
Fair Value | $ 811 | 786
3.500% notes due February 2024 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.50% |
Par Value | $ 750 | 750
Carrying Value, Noncurrent | 746 | 746
Fair Value | $ 825 | 792
2.375% notes due August 2024 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.375% |
Par Value | $ 750 | 750
Carrying Value, Noncurrent | 747 | 747
Fair Value | $ 799 | 760
3.750% notes due July 2025 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.75% |
Par Value | $ 2,000 | 2,000
Carrying Value, Noncurrent | 1,992 | 1,990
Fair Value | $ 2,283 | 2,161
3.700% notes due December 2025 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.70% |
Par Value | $ 300 | 300
Carrying Value, Noncurrent | 298 | 298
Fair Value | $ 343 | 325
1.250% notes due January 2026 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.25% |
Par Value | $ 500 | 0
Carrying Value, Noncurrent | 496 | 0
Fair Value | $ 513 | 0
3.100% notes due March 2026 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.10% |
Par Value | $ 1,000 | 1,000
Carrying Value, Noncurrent | 996 | 996
Fair Value | $ 1,118 | 1,048
3.450% notes due January 2027 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.45% |
Par Value | $ 750 | 750
Carrying Value, Noncurrent | 746 | 746
Fair Value | $ 853 | 804
3.375% notes due April 2027 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.375% |
Par Value | $ 625 | 625
Carrying Value, Noncurrent | 620 | 620
Fair Value | $ 713 | 667
2.950% notes due October 2027 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.95% |
Par Value | $ 950 | 950
Carrying Value, Noncurrent | 940 | 939
Fair Value | $ 1,060 | 988
3.850% notes due June 2028 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.85% |
Par Value | $ 1,150 | 1,150
Carrying Value, Noncurrent | 1,143 | 1,142
Fair Value | $ 1,357 | 1,269
3.875% notes due December 2028 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.875% |
Par Value | $ 850 | 850
Carrying Value, Noncurrent | 843 | 843
Fair Value | $ 1,010 | 941
2.875% notes due August 2029 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.875% |
Par Value | $ 1,000 | 1,000
Carrying Value, Noncurrent | 1,104 | 993
Fair Value | $ 1,115 | 1,029
2.000% notes due May 2030 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.00% |
Par Value | $ 1,250 | 0
Carrying Value, Noncurrent | 1,233 | 0
Fair Value | $ 1,310 | 0
4.625% notes due July 2035 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.625% |
Par Value | $ 1,000 | 1,000
Carrying Value, Noncurrent | 992 | 992
Fair Value | $ 1,317 | 1,215
5.800% notes due March 2036 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.80% |
Par Value | $ 850 | 850
Carrying Value, Noncurrent | 839 | 838
Fair Value | $ 1,231 | 1,129
6.500% Notes Due June 2037 [Member] [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.50% |
Par Value | $ 500 | 500
Carrying Value, Noncurrent | 492 | 492
Fair Value | $ 778 | 712
6.625% Notes due November 2037 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.625% |
Par Value | $ 650 | 650
Carrying Value, Noncurrent | 641 | 641
Fair Value | $ 1,027 | 940
6.875% notes due February 2038 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.875% |
Par Value | $ 1,100 | 1,100
Carrying Value, Noncurrent | 1,077 | 1,076
Fair Value | $ 1,772 | 1,631
3.500% notes due August 2039 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.50% |
Par Value | $ 1,250 | 1,250
Carrying Value, Noncurrent | 1,241 | 1,241
Fair Value | $ 1,436 | 1,313
2.750% notes due May 2040 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.75% |
Par Value | $ 1,000 | 0
Carrying Value, Noncurrent | 964 | 0
Fair Value | $ 1,057 | 0
5.700% notes due October 2040 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.70% |
Par Value | $ 300 | 300
Carrying Value, Noncurrent | 296 | 296
Fair Value | $ 438 | 396
5.950% notes due February 2041 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.95% |
Par Value | $ 350 | 350
Carrying Value, Noncurrent | 346 | 345
Fair Value | $ 525 | 475
4.625% notes due November 2041 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.625% |
Par Value | $ 600 | 600
Carrying Value, Noncurrent | 589 | 589
Fair Value | $ 787 | 716
4.375% notes due March 2042 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.375% |
Par Value | $ 502 | 502
Carrying Value, Noncurrent | 485 | 484
Fair Value | $ 639 | 580
3.950% notes due October 2042 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.95% |
Par Value | $ 625 | 625
Carrying Value, Noncurrent | 608 | 607
Fair Value | $ 760 | 688
4.250% notes due March 2043 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.25% |
Par Value | $ 750 | 750
Carrying Value, Noncurrent | 735 | 735
Fair Value | $ 949 | 856
4.750% notes due July 2045 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.75% |
Par Value | $ 2,000 | 2,000
Carrying Value, Noncurrent | 1,973 | 1,973
Fair Value | $ 2,730 | 2,463
4.200% notes due January 2047 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.20% |
Par Value | $ 750 | 750
Carrying Value, Noncurrent | 738 | 738
Fair Value | $ 950 | 861
4.250% notes due April 2047 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.25% |
Par Value | $ 725 | 725
Carrying Value, Noncurrent | 717 | 717
Fair Value | $ 923 | 839
3.750% notes due October 2047 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.75% |
Par Value | $ 950 | 950
Carrying Value, Noncurrent | 934 | 934
Fair Value | $ 1,130 | 1,023
4.250% notes due June 2048 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.25% |
Par Value | $ 1,350 | 1,350
Carrying Value, Noncurrent | 1,330 | 1,330
Fair Value | $ 1,721 | 1,569
4.450% notes due December 2048 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.45% |
Par Value | $ 1,100 | 1,100
Carrying Value, Noncurrent | 1,086 | 1,086
Fair Value | $ 1,457 | 1,316
3.700% notes due August 2049 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.70% |
Par Value | $ 1,250 | 1,250
Carrying Value, Noncurrent | 1,235 | 1,235
Fair Value | $ 1,496 | 1,344
2.900% notes due May 2050 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.90% |
Par Value | $ 1,250 | 0
Carrying Value, Noncurrent | 1,208 | 0
Fair Value | $ 1,318 | 0
3.875% notes due August 2059 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.875% |
Par Value | $ 1,250 | 1,250
Carrying Value, Noncurrent | 1,228 | 1,228
Fair Value | $ 1,529 | 1,350
3.125% notes due May 2060 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.125% |
Par Value | $ 1,000 | 0
Carrying Value, Noncurrent | 968 | 0
Fair Value | $ 1,073 | $ 0

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