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v3.21.1

Short-Term Borrowings and Long-Term Debt (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Par Value | $ 45,473 | $ 42,563
Carrying value, Combined Amount | 45,108 | 42,280
Fair Value | 50,462 | 51,301
Commercial Paper [Member] |  |
Debt Instrument [Line Items] |  |
Commercial Paper | 5,355 | 1,296
Par Value | 5,356 | 1,296
Fair Value | $ 5,355 | 1,296
4.700% notes due February 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.70% |
Par Value | $ 0 | 400
Carrying Value, Current | 0 | 400
Fair Value | $ 0 | 401
2.125% notes due March 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.125% |
Par Value | $ 0 | 750
Carrying Value, Current | 0 | 750
Fair Value | 0 | 753
Floating rate notes due June 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Par Value | 350 | 350
Carrying Value, Current | 350 | 350
Fair Value | $ 350 | 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, Current | 400 | 400
Fair Value | $ 402 | 405
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, Current | 505 | 507
Fair Value | $ 506 | 509
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, Current | 759 | 762
Fair Value | $ 764 | 768
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, Current | 1,110 |
Carrying Value, Noncurrent |  | 1,113
Fair Value | $ 1,120 | 1,127
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 | 999 | 999
Fair Value | $ 1,038 | 1,048
2.375% notes due October 2022 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.375% |
Par Value | $ 900 | 900
Carrying Value, Noncurrent | 898 | 897
Fair Value | $ 929 | 935
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 | 14 | 14
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 | 641 | 644
Fair Value | $ 648 | 654
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 | 784 | 789
Fair Value | $ 786 | 793
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 | 748
Fair Value | $ 801 | 809
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 | 747 | 747
Fair Value | $ 813 | 821
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 | 748 | 747
Fair Value | $ 790 | 799
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 | 1,992
Fair Value | $ 2,214 | 2,279
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 | $ 333 | 344
1.250% notes due January 2026 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.25% |
Par Value | $ 500 | 500
Carrying Value, Noncurrent | 496 | 496
Fair Value | $ 500 | 515
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 | 997 | 997
Fair Value | $ 1,086 | 1,121
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 | 747 | 747
Fair Value | $ 831 | 859
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 | $ 686 | 714
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 | 941 | 940
Fair Value | $ 1,024 | 1,067
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 | 1,144 | 1,143
Fair Value | $ 1,290 | 1,367
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 | 844 | 844
Fair Value | $ 958 | 1,019
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 | 1,015 | 1,086
Fair Value | $ 1,057 | 1,137
2.000% notes due May 2030 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.00% |
Par Value | $ 1,250 | 1,250
Carrying Value, Noncurrent | 1,234 | 1,234
Fair Value | $ 1,226 | 1,326
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 | $ 1,216 | 1,340
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 | 839
Fair Value | $ 1,147 | 1,271
6.500% Notes Due June 2037 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.50% |
Par Value | $ 500 | 500
Carrying Value, Noncurrent | 492 | 492
Fair Value | $ 725 | 800
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 | 642 | 641
Fair Value | $ 959 | 1,044
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 | 1,077
Fair Value | $ 1,648 | 1,802
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 | 1,242 | 1,241
Fair Value | $ 1,342 | 1,487
2.750% notes due May 2040 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.75% |
Par Value | $ 1,000 | 1,000
Carrying Value, Noncurrent | 964 | 964
Fair Value | $ 976 | 1,085
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 | $ 412 | 451
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 | 346
Fair Value | $ 494 | 540
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 | $ 736 | 820
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 | 485
Fair Value | $ 593 | 661
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 | 608
Fair Value | $ 712 | 790
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 | $ 878 | 982
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 | 1,974 | 1,974
Fair Value | $ 2,496 | 2,814
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 | $ 875 | 991
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 | 718 | 717
Fair Value | $ 847 | 963
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 | $ 1,031 | 1,180
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 | $ 1,592 | 1,803
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 | 1,087 | 1,086
Fair Value | $ 1,345 | 1,517
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 | $ 1,354 | 1,567
2.900% notes due May 2050 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.90% |
Par Value | $ 1,250 | 1,250
Carrying Value, Noncurrent | 1,208 | 1,208
Fair Value | $ 1,193 | 1,384
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 | $ 1,391 | 1,618
3.125% notes due May 2060 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.125% |
Par Value | $ 1,000 | 1,000
Carrying Value, Noncurrent | 963 | 965
Fair Value | $ 979 | $ 1,161

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